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Analog Devices Inc. LTC2312ITS8-14#TRPBF
- Part No.:
- LTC2312ITS8-14#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2312ITS8-14#TRPBF.pdf
- Description:
- IC ADC 14BIT SAR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,794
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Product details
Overview
LTC2312ITS8-14#TRPBF from Analog Devices (formerly Linear Technology) is a 14-bit, 500ksps successive approximation register (SAR) analog-to-digital converter in an 8-lead TSOT-23 package. It operates from a single 3V or 5V analog supply, integrates a low-drift (20ppm/°C max) internal reference (2.048V or 4.096V), and delivers 77dB SINAD and –85dB THD at full speed - enabling high-fidelity data acquisition in space-constrained, battery-powered systems such as handheld medical terminals and industrial sensor interfaces.
For engineers reviewing the LTC2312ITS8-14#TRPBF datasheet, LTC2312ITS8-14#TRPBF pinout, LTC2312ITS8-14#TRPBF application, or LTC2312ITS8-14#TRPBF equivalent, key selection criteria include guaranteed no missing codes, nap/sleep mode power management (<1µA sleep current), SPI-compatible 3-wire serial interface with 1.8V–5V OVDD compatibility, and operation across –40°C to +85°C.
Technical Context
The LTC2312ITS8-14#TRPBF implements a fully integrated SAR architecture with on-chip sample-and-hold, bandgap reference, and reference buffer. Its conversion timing is governed by an internal oscillator, eliminating external clock dependencies for the core ADC function.
It uses a dedicated OVDD supply (1.71V–5.25V) to drive digital I/O logic levels independently of VDD, enabling seamless interfacing with mixed-voltage host systems (e.g., 1.8V FPGA, 3.3V MCU). The SDO output enters high-impedance state when CONV is high and outputs MSB-first 14-bit data with zero-cycle latency upon falling CONV edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - guarantees monotonic transfer function and no missing codes over full temperature range. |
| Sampling Rate | 500ksps - enables real-time capture of signals up to 250kHz Nyquist bandwidth with minimal aliasing risk. |
| SINAD / SNR | 77dB / 77.5dBFS at 500ksps - supports >12.5 effective bits for precision measurement applications. |
| THD | –85dB (first 5 harmonics) - ensures low distortion in dynamic signal analysis like vibration monitoring or audio front-ends. |
| Reference Drift | 20ppm/°C max - maintains ±0.2% full-scale accuracy over –40°C to +85°C without external calibration. |
| Supply Current | 3.2mA at 500ksps (5V), 2mA in nap mode - enables ultra-low-power operation in duty-cycled sensing nodes. |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive under-hood environments. |
Pinout & Package
Package: 8-lead plastic TSOT-23 (0.65mm pitch, 2.9mm × 1.6mm footprint), RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Analog power supply input | Accepts 2.7–3.6V or 4.75–5.25V; powers internal reference, SAR core, and analog circuitry. |
| REF (Pin 2) | Reference input/output | Outputs 2.048V (3V range) or 4.096V (5V range); can be overdriven externally; requires 2.2µF ceramic bypass. |
| GND (Pin 3) | Analog ground | Primary return path for analog signals and reference; must connect directly to solid ground plane. |
| AIN (Pin 4) | Analog input | Single-ended input, 0V to VREF range; 13pF sample-mode capacitance; low DC leakage (±1µA). |
| OVDD (Pin 5) | Digital I/O supply | 1.71–5.25V supply setting logic levels for SDO, SCK, CONV; decoupled with 2.2µF capacitor. |
| SDO (Pin 6) | Serial data output | Three-state output; MSB-first 14-bit stream; high-impedance when CONV = high; driven by OVDD voltage. |
| SCK (Pin 7) | Serial clock input | Accepts up to 20MHz clock; data latched on falling edge; timing referenced to OVDD. |
| CONV (Pin 8) | Convert control input | Active-high start signal; rising edge initiates conversion; falling edge enables SDO and starts sampling. |
Key Features
| Feature | Design Value |
|---|---|
| No cycle latency | Conversion result appears on SDO immediately after falling CONV edge - eliminates pipeline delay in closed-loop control. |
| Integrated reference buffer | Eliminates need for external reference IC and buffer op amp - reduces BOM count and PCB area by ≥3 components. |
| Nap mode auto-entry | Enters 2mA low-power state automatically after each conversion - cuts average current by >50% at 100ksps sampling. |
| Sleep mode (0.2µA) | Full shutdown via 4× CONV pulse - enables multi-year battery life in intermittent wake-up sensor nodes. |
| Wide OVDD range (1.71–5.25V) | Direct interface with 1.8V, 2.5V, 3.3V, or 5V logic without level shifters - simplifies system integration. |
Applications
| Handheld Medical Terminal | Industrial Vibration Monitor |
|---|---|
Use Scenario: Portable ECG or blood glucose meter acquiring analog biosignals at ≤500ksps with battery life >24 hours. IC Role / Device Role / Timing Role: Primary SAR ADC digitizing conditioned analog front-end output; provides precise 14-bit resolution with minimal power overhead. Use Value: Integrated 2.048V reference and nap mode reduce total system power to <15mW, extending coin-cell battery life by 3× vs discrete reference solutions. |
Use Scenario: Edge node in predictive maintenance system capturing accelerometer waveforms from rotating machinery. IC Role / Device Role / Timing Role: High-SNR ADC capturing transient vibration bursts; synchronized via external trigger to CONV pin. Use Value: 77dB SINAD enables detection of sub-millig acceleration harmonics; 500ksps throughput captures full spectral content up to 250kHz. |
| Automotive Cabin Sensor Hub | Uninterruptible Power Supply (UPS) Monitoring |
Use Scenario: In-vehicle air quality and occupant detection module operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Temperature-stable ADC digitizing CO₂, humidity, and IR proximity sensor outputs. Use Value: 20ppm/°C reference drift ensures <±0.2% FS error over full automotive temperature range - eliminates field recalibration. |
Use Scenario: Real-time AC line voltage, current, and battery voltage monitoring in 1–3kVA UPS units. IC Role / Device Role / Timing Role: Isolated analog input ADC feeding protection algorithm in safety-critical power control loop. Use Value: Zero-cycle latency and guaranteed no missing codes prevent false trip events during fast transients like lightning surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | 16-bit resolution, 1MSPS, SPI interface, 2.5V supply only, no internal reference - requires external REF3025 and buffer. | Better resolution but higher power (3.5mA) and no temperature-compensated reference - suited for lab-grade instrumentation, not portable systems. | Select ADS8860IDRCT only if 16-bit ENOB and >1MSPS are mandatory; accept added BOM cost and layout complexity. |
| MAX11198ETE+ | 14-bit, 500ksps, internal 2.048V reference, 1.8V–3.6V VDD only, 8-pin TDFN - lacks 5V operation and OVDD flexibility. | Lower supply range limits use in 5V industrial PLCs; identical nap/sleep modes and performance - drop-in for 3.3V-only designs. | Choose MAX11198ETE+ for cost-sensitive 3.3V systems where 5V tolerance and OVDD voltage independence are unnecessary. |
Compared with ADS8860IDRCT and MAX11198ETE+, the LTC2312ITS8-14#TRPBF uniquely combines 5V operation, dual-voltage OVDD support, and integrated low-drift reference in a TSOT-23 package - making it optimal for compact, wide-temperature, mixed-voltage embedded data acquisition.
Availability
LTC2312ITS8-14#TRPBF is available at Aetrix Electronics and suitable for industrial sensor interfaces, handheld medical terminals, and automotive cabin monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2312ITS8-14#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2312-14 belongs to ADI's precision SAR ADC product line, designed specifically for space-constrained, low-power, high-speed data acquisition where integrated references and flexible digital interfacing reduce system complexity.
FAQ
What is the operating temperature range for the LTC2312ITS8-14#TRPBF?
The LTC2312ITS8-14#TRPBF is rated for operation from –40°C to +85°C (industrial grade). This is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section of the official datasheet, where all "l"-marked parameters apply across this full range. The device is not rated for automotive AEC-Q100 or military temperature grades.
Does the LTC2312ITS8-14#TRPBF require an external reference?
No, the LTC2312ITS8-14#TRPBF includes an integrated, factory-trimmed reference that outputs either 2.048V (when VDD is 2.7–3.6V) or 4.096V (when VDD is 4.75–5.25V). External reference use is optional and only needed if higher accuracy or custom voltage spans are required - the internal reference achieves 20ppm/°C max drift and eliminates external component count.
How does the nap mode function in the LTC2312ITS8-14#TRPBF?
The LTC2312ITS8-14#TRPBF automatically enters nap mode (2mA typical supply current) after each conversion completes. This low-power state retains reference buffer and bandgap bias, enabling wake-up and valid conversion within one acquisition cycle (700ns). Nap mode is distinct from sleep mode (0.2µA), which shuts down reference circuitry and requires 1.1ms recovery before accurate conversion.
Can the LTC2312ITS8-14#TRPBF interface directly with a 1.8V microcontroller?
Yes. The LTC2312ITS8-14#TRPBF supports OVDD from 1.71V to 5.25V, allowing direct connection to 1.8V logic without level shifters. When OVDD = 1.8V, SDO output swing is referenced to 1.8V, and SCK/CONV input thresholds scale accordingly (VIH = 0.8 × OVDD, VIL = 0.2 × OVDD), ensuring robust interoperability.
What is the minimum acquisition time for the LTC2312ITS8-14#TRPBF at 500ksps?
The minimum acquisition time (tACQ) for the LTC2312ITS8-14#TRPBF is 700ns, as specified in the ADC Timing Characteristics table. This value is guaranteed across the full operating temperature range and is required to achieve full 14-bit accuracy at maximum sampling rate. Driving sources must settle within this window - a buffer amplifier with <700ns small-signal settling time is recommended for high-Z sources.
LTC2312ITS8-14#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V, 5V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V, 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- TSOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2312ITS8-14#TRPBF FAQ
1.How can I place an order for LTC2312ITS8-14#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2312ITS8-14#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC2312ITS8-14#TRPBF reliable?
The price and inventory of LTC2312ITS8-14#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2312ITS8-14#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2312ITS8-14#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2312ITS8-14#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2312ITS8-14#TRPBF?
LTC2312ITS8-14#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2312ITS8-14#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC2312ITS8-14#TRPBF?
For technical support, including LTC2312ITS8-14#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2312ITS8-14#TRPBF requirements.
6.How does Aetrix verify that LTC2312ITS8-14#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2312ITS8-14#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC2312ITS8-14#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2312ITS8-14#TRPBF?
All LTC2312ITS8-14#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2312ITS8-14#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC2312ITS8-14#TRPBF part is unused and in its original packaging.
Return procedure for LTC2312ITS8-14#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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